Paint and varnish remover.



l below 400 C. so that no part of the mate- 1 rial issubjected to'an inju'rioustemperature. The vapors of the butyrone or other heptyl 1 '50 densed. This process gives as well as the a No Drawing.

U ITED Mamas Parana W W CA RLETON ELLIS, OF WHITE PLAINS, NEW YORK, ASSIGNOR 'IO CHADELOID CHEMICAL COMPANY, OF NEW YORK, N. Y., A CORPORATION OF WEST VIRGINIA.

-PA INT A'ND VARNISH REMOVER.

. Specification of Letters Patent. Application filed November 26, 1906. Serial No. 315,040.

Patented'June 6, 1911.

To all whom it may concern! Be it known that I, CARLETON Ennis, a citizen of the United States, and resident of White Plains, .in the county of Westchester and State of New York, have invented cert'ain new and useful Improvements in Paintand Varnish Removers, of which the following is a specification.

This invention relates to paint and varnish removers and relates especially to removers comprising butyrone and its isomers, the

other heptyl ketones having the formula- Butyrone may be readily prepared through the" fermentation of starch or similar material and the subsequent destructive distillation of the products.

or skimmed milk in water, which in case starch is'used maybe accomplished by boiling. ,Thereafter precipitatedcalcium carbonate, for example, to 'the extent of about half the weight of starch is preferably incorporated with the solution. This solution can be inoculated with "any of the butyric bacteria and if maintained at a temperature, preferably between 37, and 40 C. for several weeks butyric fermentation takes place, producing through the reaction, upon the calcium carbonate calcium butyrate and some allied bodies. When sufficiently fermented this material may be filtered to remove the remaining suspended material and on boiling the calcium butyrate is precipitated and may be readily separated by filtr'a tion from the other allied fermentation products. This butyrate is preferably dried and subjected to destructive distillation in suitable apparatus, preferably at as low a temperature as possible or at a uniform temperature with very rapid agitation to prevent local overheating,a vacuumbeing preferably employed during this operation, and the temperature beingpreferably kept ketones that is, ketones having seven carbon atoms are led through a condenser and con- 7' strict butyrone or 4-heptanon some iso butyrdne or iso-dipropyl ketone, other heptyl Thismay be con- Yveniently acc'omplishedby making a solu-"i tion of starch, sugar, milk sugar, dextrose '01- similar hydrocarbon course, be combined in any orde'rian ethyl butyl ketone, the formula of all these bodies being 0 11 0. It is, of course,.understood that the butyrone and other heptyl ketones may be produced, if. desired, in other ways, the method previously described being merely an illustrative one for producing them commercially, in which, of course, the desired fermentation may be promoted by such well known means as the employment of nutrient and phosphatic or other materials familiarin bacteriological work. These heptyl ketones maybe used in removers preferably afterthe incorporation of stifie'ning material, such as wood flour,

starch, whitin g, infusorial earth, or the-like,

and wax may also be used forthis purpose and to form an impervious evaporation retarding .film which assists the operations under extreme service conditions.

A desirable remover may be prepared by dissolving six parts-of paraifin or ceresin wax in 25 parts ofzjb homologues, x solvents and offheptyl kethenincorporating-$ 751 I tones, preferably 'butyronefiandf25 wood alcohol or ",OthBI- Slfllllfi H bodies, although such ingredients,

incorporated by heating andagitati "11. It is, of course, unnecessary in all cases to employ the benzol or similar solvents or the waxmentioned, and other stiffening? material may naturally be substituted for the wax when desired for many classes of work.

Another desirable remover may be made Ot er solvents, such as alcoholic bodies, benzol',-b1i its equivalents, may be usedwith advantage.

ra tspf,

olio

byincorporating two parts of waxy bodies,

such as, for example, paraflin or ceresin wax,

with 90 parts of heptylketones, preferably butyrone, and. suitable stiffening material may be used in the form ofeight parts of wood flour, the *lightest air separated product derived from sawdust and similar material being most desirable, although, of course, the wax may also be omitted in. some cases.

Having thus described this invention in connection with several illustrative examples, to the details of which it is not, of course, to be limited, what is claimed as new and what is 'desired to. be'secured by Letters Patent is set forth in the appended claims;

1. The remover for paint or varnish comprising butyrone about 75 parts, alcoholic bodies about 25 parts, aromatic hydrocarbon wax solvents about 25 parts and Wax about 6 parts. p a h v 2 The-remover for paint or varnish comprising approximately butyrone 'parts,

alcoholic bodies 2 5 parts, aromatic hydro-" carbon wax solvents including "benzol 25 parts and oeresin'wavr 6 parts. i

1 3. The remover for paint or varnish comprising approximately butyrone 7-5 1 parts, Wood ,alcoholv2 5 parts, benzol 25 parts and ceresin Wax 6 parts.

4. The remover for paint or varnish comprising approximately .butyrone 7 5, parts,

Wood alcoholparts, aromatic Solventsi25 parts and Wax 6 parts. 75'. The substantially fluent remover for paint o'r'varnish comprising approximately seventy-five parts'of neutral key'tonefsolvents having seven carbon atoms; alcoholic biodiestjwenty-five'parts, aromatic hydrocar- *F bonmvax solvent material twenty-five parts and incorporated Wax. 1 o

- 6. The substantially fluent remover for paint or varnish comprising approximately seventy-five parts of substantially neutral keytone solvents having sevencarbon atoms,

approximately "fifty parts of'incorporated eluding dissolved Waxsolvent material including an alcoholic body and Waxy stiffening material. 7. The substantially fluent remover fo paint or varnish comprising approximately seventy-five parts of ketone solvents having fiye parts aromatic finish solvent material twenty-five parts, and incorporated stiflerring material.

'seven carbon atoms, wood alcohol tWenty- .8.'Thesubstantially fluent remover for painter varnish consisting essentially of composite volatileorganic finish softening material comprising a large proportion of ,butyrone and incorporated alcoholic finis'h solvent material an stiffening material in:

9. The substantially, fluent remover for paint or varnish consisting essentially of substantially neutral volatile organic finish softening material comprising a large proportion of neutral keytone solvents having 

